Man every time I rewatch Dabi's Dance I feel so disappointed. It's a good scene, but it could have been a great one if a little more effort had gone into it. One thing I appreciated about early MHA was the tone setting. The hope people on both sides of the coin had. The good vs evil power struggle that was set up to be a cheesy cliché with cartoonish and loser villains, but it was okay because Horikoshi was going to challenge those expectations (or so I thought). Everyone figured out Dabi's identity immediately, so the reveal that he was actually Tōya Todoroki was never going to be a big plot twist. The excitement would come from confirmation that our theory was right and how that reveal would go down in canon.
Another scene with the same bright blue background we always see was not what I would have expected for a big moment like this. That damn sky is such a staple in MHA that when it changes, it feels important. Endeavor got a beautiful pink sunset to compliment his orange flames. It was beautifully done and poetic. He was putting to rest a version of himself he no longer wished to be. Endeavor was the setting sun in that scene.
But Dabi was just some guy. That pivotal moment doesn't stand out the same way. There's no environmental support in the story telling like his abuser got, which is a little sick. There was a war starting. Gone was the time of peace or bright sunny skies. Sure, save the dark, gloomy rainstorm for the final battle. There was significance in the weather there too. Katsuki Bakugo hates the rain after all. But why not something in-between for Dabi? There's two ways I imagine that scene. A "canon" version and a fanon version.
Canon: how I imagine Bones would have actually done it if things were different. It's dim and grey. That sickly greenish yellow color the sky sometimes turns before a big storm. The clouds are thicker and various shades of grey like smoke in the atmosphere. You can still see glimpses of that pleasant blue sky while the storm clouds roll in, eating away at it. Sunlight filters through those gaps, shining down on Dabi. The spotlight on a performer taking the stage.
Fanon: Based on personal headcanons. Tōya has a star motif. He is an imploding blue sun, or Jupiter. Sometimes just for funsies, he's an astrology girlie, you get the gist. Stargazing is his time to reflect and ground himself. So isn't it something that the night of his reveal is empty? The sun had already set in Fukuoka. Something else rises now. A bite of the sky washes away as Dabi dumps an entire bottle of bleach on his head revealing locks as bright white as distant stars. Blue is no longer the color of hope or peace. It's the glow of fatality as he stands not in a spotlight— but centered in the empty gap where the moon should have been. Where the warm, red sun that gave them all life had just stood yesterday.
